The product is convenient to use and simple to operate with high measurement precision and is suitable for environmental protection, waste water treatment, chemical laboratories, pharmacy, fermentation, chemical engineering, tap water and other fields. specifications Specifications: LED Display :three and a half digit display Measurement range: PH: 0PH-14PH mV: -415mV-415mV Resolution ratio: 0.01PH, 1mV PH measurement error: +/-0.1%FS The temprerature of the measured solution: 5& 8451;-60& 8451; Temprerature compensation scope: 0-60& 8451; Automatic power-off time: 4 minutes Weight of the host: 145g Dimension of the host: 165*75*32mm Accessory: Standard buffer reagent ( one packet of PH4.00, KCL solution package and PH9.18 respectively )/ user manual/ potassium chloride power packe/ PH non-chargeable combination electrode/ 3 AA batteries Normal use condition of the instrument 1. Environment temperature: 0& 8451;-40& 8451; 2. Relative humidity: ≤85%RH (No condensation) 3. Power supply: 3 AA batteries 4. No vibration affecting performance in surrounding area. 5. No corrosive gas in the surrounding air 6. No other magnetic field interference except earth magnetic field